Tenacity
Brittle
Brittle
Solubility
-
-
Durability
-
-
Specific Gravity
3.0-3.13.87-4.14
1
7.18
👆🏻
Fracture
-
Subconchoidal, Conchoidal
Cleavage
Perfect on {001}
Poor on {120}, in traces on {001}
Mohs Hardness
3.55.5-6
2
10
👆🏻
Chemical Composition
Ca(Mg,Al)3(Al3Si)O10(OH)2
TiO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references